content: /*
   * Copyright 2017 David Karnok
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package hu.akarnokd.reactive4javaflow.impl.operators;
  
  import java.util.Iterator;
  
  public final class FailingIterable implements Iterable<Integer> {
      int iterator;
      final int hasNext;
      final int next;
  
      public FailingIterable(int iterator, int hasNext, int next) {
          this.iterator = iterator;
          this.hasNext = hasNext;
          this.next = next;
      }
  
      @Override
      public Iterator<Integer> iterator() {
          if (--iterator == 0) {
              throw new IllegalStateException("iterator");
          }
          return new FailingIterator(hasNext, next);
      }
  
      static final class FailingIterator implements Iterator<Integer> {
          int hasNext;
          int next;
  
          int count;
  
          FailingIterator(int hasNext, int next) {
              this.hasNext = hasNext;
              this.next = next;
          }
  
          @Override
          public boolean hasNext() {
              if (--hasNext == 0) {
                  throw new IllegalStateException("hasNext");
              }
              return true;
          }
  
          @Override
          public Integer next() {
              if (--next == 0) {
                  throw new IllegalStateException("next");
              }
              return ++count;
          }
      }
  }
  